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Walden K, Martin ME, LaBee L, Provorse Long M. Hydration and Charge-Transfer Effects of Alkaline Earth Metal Ions Binding to a Carboxylate Anion, Phosphate Anion, and Guanine Nucleobase. J Phys Chem B 2021; 125:12135-12146. [PMID: 34706195 DOI: 10.1021/acs.jpcb.1c05757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To investigate the ability of alkaline earth metal ions to tune ion-mediated DNA adsorption, hydrated Mg2+, Ca2+, Sr2+, and Ba2+ ions bound to a carboxylate anion, phosphate anion, and guanine nucleobase were modeled using density functional theory (DFT) and a combined explicit and continuum solvent model. The large first solvation shell of Ba2+ requires a larger solute cavity defined by a solvent-accessible surface, which is used to model all hydrated ions. Alkaline earth metal ions bind indirectly or directly to each binding site. DFT binding energies decrease with increasing ion size, which is likely due to ion size and hydration structure, rather than quantum effects such as charge transfer. However, charge transfer explains weaker ion binding to guanine compared to phosphate or carboxylate. Overall, carboxylate and phosphate anions are expected to compete equally for hydrated Mg2+, Ca2+, Sr2+, and Ba2+ ions and larger alkaline earth metal ions may induce weaker ion-mediated adsorption. The ion size and hydration structure of alkaline earth metal ions may effectively tune ion-mediated adsorption processes, such as DNA adsorption to functionalized surfaces.
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Affiliation(s)
- Kathryn Walden
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Madison E Martin
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Lacey LaBee
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Makenzie Provorse Long
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
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Zhang D, Pan W, Zhou L, Yu S. Room-Temperature Benzene Sensing with Au-Doped ZnO Nanorods/Exfoliated WSe 2 Nanosheets and Density Functional Theory Simulations. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33392-33403. [PMID: 34228931 DOI: 10.1021/acsami.1c03884] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A gold-doped zinc oxide (Au-ZnO)/exfoliated tungsten diselenide (exfoliated WSe2) nanocomposite-based gas sensor toward benzene with high sensing properties was demonstrated. Epoxy resin was used as the matrix of the Au-ZnO/exfoliated WSe2 nanocomposite sensor. The straw-shaped Au-ZnO was synthesized by the hydrothermal method, and WSe2 nanosheets (NSs) were prepared via hydrothermal and liquid-phase exfoliation methods. The properties of Au-ZnO/exfoliated WSe2 nanoheterostructures constructed by self-assembly technology have been confirmed via a series of characterization methods. The benzene-sensing performances of sensors were tested at 25 °C. Compared with Au-ZnO, WSe2, and their composites, the Au-ZnO/exfoliated WSe2 sensor has a significant performance improvement, including a higher response and linear fit degree, better selectivity and repeatability, and faster detection rate. The significantly enhanced sensing properties of the Au-ZnO/exfoliated WSe2 sensor can be ascribed to the doping of Au nanoparticles, the increase in the specific surface area and adsorption sites of NSs after exfoliation, and the cooperative interface combination of the ZnO/WSe2 heterojunction. Furthermore, the sensitivity mechanism of the composite sensor to benzene was explored by density functional theory simulations.
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Affiliation(s)
- Dongzhi Zhang
- College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Wenjing Pan
- College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Lanjuan Zhou
- College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Sujing Yu
- College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
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Long MP, Alland S, Martin ME, Isborn CM. Molecular dynamics simulations of alkaline earth metal ions binding to DNA reveal ion size and hydration effects. Phys Chem Chem Phys 2020; 22:5584-5596. [DOI: 10.1039/c9cp06844a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Classical molecular dynamics simulations reveal size-dependent trends of alkaline earth metal ions binding to DNA are due to ion size and hydration behavior.
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Affiliation(s)
| | - Serra Alland
- Department of Chemistry and Biochemistry
- University of Central Arkansas
- Arkansas 72035
- USA
| | - Madison E. Martin
- Department of Chemistry and Biochemistry
- University of Central Arkansas
- Arkansas 72035
- USA
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Hu H, Zavabeti A, Quan H, Zhu W, Wei H, Chen D, Ou JZ. Recent advances in two-dimensional transition metal dichalcogenides for biological sensing. Biosens Bioelectron 2019; 142:111573. [DOI: 10.1016/j.bios.2019.111573] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/27/2019] [Accepted: 08/03/2019] [Indexed: 12/23/2022]
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Lee KN, Bang S, Duong NT, Yun SJ, Park DY, Lee J, Choi YC, Jeong MS. Encapsulation of a Monolayer WSe 2 Phototransistor with Hydrothermally Grown ZnO Nanorods. ACS APPLIED MATERIALS & INTERFACES 2019; 11:20257-20264. [PMID: 31074258 DOI: 10.1021/acsami.9b03508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Transition metal dichalcogenides (TMDCs) are promising two-dimensional (2D) materials for realizing next-generation electronics and optoelectronics with attractive physical properties. However, monolayer TMDCs (1LTMDCs) have various serious issues, such as instability under ambient conditions and low optical quantum yield from their extremely thin thickness of ∼0.7 nm. To overcome these issues, we constructed a hybrid structure (HS) by growing zinc oxide nanorods (ZnO NRs) on a monolayer tungsten diselenide (1LWSe2) using the hydrothermal method. Consequently, we confirmed not only enhanced photoluminescence of 1LWSe2 but also improved optoelectronic properties by fabricating the HS phototransistor. Through various investigations, we found that these phenomena were due to the antenna and p-type doping effects attributed to the ZnO NRs. In addition, we verified that the optoelectronic properties of 1LTMDCs are maintained for 2 weeks in ambient condition through the sustainable encapsulation effect induced by our HS. This encapsulation method with inorganic materials is expected to be applied to improve the stability and performance of various emerging 2D material-based devices.
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Affiliation(s)
- Kang-Nyeoung Lee
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- Korea Institute of Carbon Convergence Technology , Jeonju 54853 , Republic of Korea
| | - Seungho Bang
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Ngoc Thanh Duong
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Seok Joon Yun
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Dae Young Park
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Juchan Lee
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Young Chul Choi
- Korea Institute of Carbon Convergence Technology , Jeonju 54853 , Republic of Korea
| | - Mun Seok Jeong
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
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Zhang D, Du J, Hong YL, Zhang W, Wang X, Jin H, Burn PL, Yu J, Chen M, Sun DM, Li M, Liu L, Ma LP, Cheng HM, Ren W. A Double Support Layer for Facile Clean Transfer of Two-Dimensional Materials for High-Performance Electronic and Optoelectronic Devices. ACS NANO 2019; 13:5513-5522. [PMID: 31013418 DOI: 10.1021/acsnano.9b00330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Clean transfer of two-dimensional (2D) materials grown by chemical vapor deposition is critical for their application in electronics and optoelectronics. Although rosin can be used as a support layer for the clean transfer of graphene grown on Cu, it has not been usable for the transfer of 2D materials grown on noble metals or for large-area transfer. Here, we report a poly(methyl methacrylate) (PMMA)/rosin double support layer that enables facile ultraclean transfer of large-area 2D materials grown on different metals. The bottom rosin layer ensures clean transfer, whereas the top PMMA layer not only screens the rosin from the transfer conditions but also improves the strength of the transfer layer to make the transfer easier and more robust. We demonstrate the transfer of monolayer WSe2 and WS2 single crystals grown on Au as well as large-area graphene films grown on Cu. As a result of the clean surface, the transferred WSe2 retains the intrinsic optical properties of the as-grown sample. Moreover, it does not require annealing to form good ohmic contacts with metal electrodes, enabling high-performance field effect transistors with mobility and ON/OFF ratio ∼10 times higher than those made by PMMA-transferred WSe2. The ultraclean graphene film is found to be a good anode for flexible organic photovoltaic cells with a high power conversion efficiency of ∼6.4% achieved.
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Affiliation(s)
- Dingdong Zhang
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Jinhong Du
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Yi-Lun Hong
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Weimin Zhang
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Xiao Wang
- Centre for Organic Photonics & Electronics, School of Chemistry and Molecular Biosciences , The University of Queensland , Brisbane QLD 4072 , Australia
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , P.R. China
| | - Hui Jin
- Centre for Organic Photonics & Electronics, School of Chemistry and Molecular Biosciences , The University of Queensland , Brisbane QLD 4072 , Australia
| | - Paul L Burn
- Centre for Organic Photonics & Electronics, School of Chemistry and Molecular Biosciences , The University of Queensland , Brisbane QLD 4072 , Australia
| | - Junsheng Yu
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering , University of Electronic Science and Technology of China (UESTC) , Chengdu 610054 , P.R. China
| | - Maolin Chen
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Dong-Ming Sun
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Meng Li
- Shenyang Institute of Automation , Chinese Academy of Sciences , 114 Nanta Street , Shenyang 110016 , P.R. China
| | - Lianqing Liu
- Shenyang Institute of Automation , Chinese Academy of Sciences , 114 Nanta Street , Shenyang 110016 , P.R. China
| | - Lai-Peng Ma
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute , Tsinghua University , 1001 Xueyuan Road , Shenzhen 518055 , P.R. China
| | - Wencai Ren
- Shenyang National Laboratory for Materials Science , Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road , Shenyang 110016 , P.R. China
- School of Materials Science and Engineering , University of Science and Technology of China , 72 Wenhua Road , Shenyang 110016 , P.R. China
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Luo P, Zhuge F, Zhang Q, Chen Y, Lv L, Huang Y, Li H, Zhai T. Doping engineering and functionalization of two-dimensional metal chalcogenides. NANOSCALE HORIZONS 2019; 4:26-51. [PMID: 32254144 DOI: 10.1039/c8nh00150b] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two-dimensional (2D) layered metal chalcogenides (MXs) have significant potential for use in flexible transistors, optoelectronics, sensing and memory devices beyond the state-of-the-art technology. To pursue ultimate performance, precisely controlled doping engineering of 2D MXs is desired for tailoring their physical and chemical properties in functional devices. In this review, we highlight the recent progress in the doping engineering of 2D MXs, covering that enabled by substitution, exterior charge transfer, intercalation and the electrostatic doping mechanism. A variety of novel doping engineering examples leading to Janus structures, defect curing effects, zero-valent intercalation and deliberately devised floating gate modulation will be discussed together with their intriguing application prospects. The choice of doping strategies and sources for functionalizing MXs will be provided to facilitate ongoing research in this field toward multifunctional applications.
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Affiliation(s)
- Peng Luo
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
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Song W, Zhu J, Kong W, Möhwald H, Li J. Different Microtubule Structures Assembled by Kinesin Motors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9768-9773. [PMID: 30021432 DOI: 10.1021/acs.langmuir.8b00662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The microtubule-kinesin system is used to form microtubule-based structures via microtubule gliding motility. On the kinesin-coated surface, the microtubules can be easily assembled into stable micro- and nanostructures like circles and microtubule bundles using the streptavidin-biotin system. Furthermore, these microtubules structures can still retain performance with kinesin motor movement in spite of different velocities. Collisions bear responsibility for the majority of events leading to circle formation. By taking advantage of biological substances, some micro- or nanostructures, which are difficult to fabricate by artificial processes, can be easily obtained.
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Affiliation(s)
- Weixing Song
- Department of Chemistry , Capital Normal University , Beijing 100048 , P.R. China
| | - Jianxiong Zhu
- School of Mechanical Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu , Daejeon 34141 , Republic of Korea
| | - Weimin Kong
- Department of Chemistry , Capital Normal University , Beijing 100048 , P.R. China
| | - Helmuth Möhwald
- Max Planck Institute of Colloids and Interfaces , Am Mühlenberg 1 , Golm, Potsdam D-14476 , Germany
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), International Joint Lab, Institute of Chemistry, Chinese Academy of Science , Beijing 100080 , China
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Sun H, Wang J, Wang F, Xu L, Jiang K, Shang L, Hu Z, Chu J. Enhanced exciton emission behavior and tunable band gap of ternary W(S xSe 1-x) 2 monolayer: temperature dependent optical evidence and first-principles calculations. NANOSCALE 2018; 10:11553-11563. [PMID: 29892765 DOI: 10.1039/c8nr01823e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Up to date, the electronic and optical properties of WS2 and WSe2 have been widely explored. However, the synthesis and characterization of their ternary alloy nanosheets have been rarely reported. Here, we fabricated single layer W(SxSe1-x)2 nanosheets by a one-step chemical vapor deposition (CVD) method. It is demonstrated that exciton emission behavior of single layer W(SxSe1-x)2 nanosheets (0 ≤ x ≤ 1) can be remarkably tuned by changing the sulfur content. The theoretical calculations proved that single layer W(SxSe1-x)2 alloy has a direct gap, and the band gap can be tuned by the sulfur content, which is in accordance with the spectral experiments. Moreover, we present temperature-dependent photoluminescence (PL) measurements in monolayers of W(SxSe1-x)2 alloys from 80 K to 320 K. The neutral exciton (X) and charged exciton (trion, T) can be observed at all measured temperatures. In sulfur-rich ternary W(SxSe1-x)2 alloys, the trion dominates the PL spectra at low temperatures while the exciton dominates the PL spectra at higher temperatures. In selenium-rich ternary alloys, however, the exciton is dominant in PL spectra at all measured temperatures. As the sulfur content gradually increases, the intensity ratio of the trion to exciton becomes dramatically larger. There is an obvious upward trend of the trion intensity in W(SxSe1-x)2 monolayers, which results from the significant growth of the two-dimensional electron gas (2DEG) concentration. On the other hand, the strong exciton-trion coupling mediated by an optical phonon also contributes to this improvement. These results indicate that exciton emission behavior of W(SxSe1-x)2 monolayers is controllable with the sulfur content. It highlights the importance of further detailed characterization on exciton features in ternary alloy nanosheets, and can enable spectral tunability for potential optoelectronic applications.
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Affiliation(s)
- Huimin Sun
- Key Laboratory of Polar Materials and Devices (MOE) and Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Department of Electronic Engineering, East China Normal University, Shanghai 200241, China.
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